W

[This is preliminary documentation and subject to change.]

WBEM class

A template for a type of managed object. WBEM classes define the basic units of management. Each class is a template for a type of managed object, and all instances of the type use the template. For example, the __Win32Provider class is a template for all object providers.

WBEM event

An instance of an event class, generated to notify a registered client of a particular occurrence.

Events arising in the real world are extrinsic events, while events that reflect changes in the CIMOM repository are intrinsic events.

After an event, an event provider generates an event notification, which is delivered by CIMOM to one or more registered recipients, known as event consumers.

WBEM Query Language (WQL)

A dialect of structured query language (SQL) with extensions to support WBEM event notification and other WBEM-specific features.

Also see REFERENCES OF, ASSOCIATORS OF, GROUP BY, HAVING COUNT, ISA, WHERE, WITHIN, and the WBEM Query Language.

WHERE

A clause in the WQL SELECT statement that constrains a query such that subsets of class instances can be selected.

Also see GROUP BY, HAVING COUNT, ISA, WHERE, WITHIN, and the WQL SELECT Statement.

Win32 schema

A Microsoft® extension to the CIM schema that contains definitions for classes and instances for objects that exist in a typical Win32 environment.

Windows Driver Model (WDM)

An important low-level component that provides access between Windows Management Instrumentation (WMI) and hardware devices.

Windows Management Instrumentation (WMI)

A set of extensions to the Windows Driver Model (WDM). WMI provides an operating system interface through which instrumented components can provide information and notification.

WITHIN

A clause in the WQL SELECT statement that constrains the granularity of event delivery time and helps CIMOM simulate events by sampling when no event provider exists for a given class.

Also see GROUP BY, HAVING COUNT, ISA, WHERE, the WQL SELECT Statement, and the SELECT Statement WITHIN Clause.

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